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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: BerkeleyKVDatabase.html 878 2015-04-17 01:32:03Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.kv.bdb;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.sleepycat.je.Database;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.sleepycat.je.DatabaseConfig;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import com.sleepycat.je.DatabaseException;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import com.sleepycat.je.Environment;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import com.sleepycat.je.EnvironmentConfig;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import com.sleepycat.je.Transaction;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import com.sleepycat.je.TransactionConfig;<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.io.File;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.ArrayList;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.HashSet;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import javax.annotation.PostConstruct;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import javax.annotation.PreDestroy;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.jsimpledb.kv.KVDatabase;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.jsimpledb.kv.KVDatabaseException;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.slf4j.Logger;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.slf4j.LoggerFactory;<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>/**<a name="line.30"></a>
<span class="sourceLineNo">031</span> * Oracle Berkeley DB Java Edition {@link KVDatabase} implementation.<a name="line.31"></a>
<span class="sourceLineNo">032</span> *<a name="line.32"></a>
<span class="sourceLineNo">033</span> * &lt;p&gt;<a name="line.33"></a>
<span class="sourceLineNo">034</span> * A {@linkplain #setDirectory database directory} is the only required configuration property, but the<a name="line.34"></a>
<span class="sourceLineNo">035</span> * {@link Environment}, {@link Database}, and {@link Transaction}s may all be configured.<a name="line.35"></a>
<span class="sourceLineNo">036</span> * Instances may be stopped and (re)started multiple times.<a name="line.36"></a>
<span class="sourceLineNo">037</span> * &lt;/p&gt;<a name="line.37"></a>
<span class="sourceLineNo">038</span> *<a name="line.38"></a>
<span class="sourceLineNo">039</span> * @see &lt;a href="http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/overview/index-093405.html"<a name="line.39"></a>
<span class="sourceLineNo">040</span> *  &gt;Oracle Berkeley DB Java Edition&lt;/a&gt;<a name="line.40"></a>
<span class="sourceLineNo">041</span> */<a name="line.41"></a>
<span class="sourceLineNo">042</span>public class BerkeleyKVDatabase implements KVDatabase {<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>// Locking order: (1) BerkeleyKVTransaction, (2) BerkeleyKVDatabase<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    /**<a name="line.46"></a>
<span class="sourceLineNo">047</span>     * Default Berkeley DB database name ({@value #DEFAULT_DATABASE_NAME}).<a name="line.47"></a>
<span class="sourceLineNo">048</span>     *<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * @see #setDatabaseName setDatabaseName()<a name="line.49"></a>
<span class="sourceLineNo">050</span>     */<a name="line.50"></a>
<span class="sourceLineNo">051</span>    public static final String DEFAULT_DATABASE_NAME = "JSimpleDB";<a name="line.51"></a>
<span class="sourceLineNo">052</span><a name="line.52"></a>
<span class="sourceLineNo">053</span>    private static final ThreadLocal&lt;TransactionConfig&gt; NEXT_TX_CONFIG = new ThreadLocal&lt;&gt;();<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>    private final Logger log = LoggerFactory.getLogger(this.getClass());<a name="line.55"></a>
<span class="sourceLineNo">056</span>    private final DatabaseConfig databaseConfig = new DatabaseConfig()<a name="line.56"></a>
<span class="sourceLineNo">057</span>      .setAllowCreate(true)<a name="line.57"></a>
<span class="sourceLineNo">058</span>      .setTransactional(true);<a name="line.58"></a>
<span class="sourceLineNo">059</span>    private final HashSet&lt;BerkeleyKVTransaction&gt; openTransactions = new HashSet&lt;&gt;();<a name="line.59"></a>
<span class="sourceLineNo">060</span>    private EnvironmentConfig environmentConfig = new EnvironmentConfig()<a name="line.60"></a>
<span class="sourceLineNo">061</span>      .setAllowCreate(true)<a name="line.61"></a>
<span class="sourceLineNo">062</span>      .setTransactional(true)<a name="line.62"></a>
<span class="sourceLineNo">063</span>      .setTxnSerializableIsolation(true);<a name="line.63"></a>
<span class="sourceLineNo">064</span>    private TransactionConfig defaultTransactionConfig = TransactionConfig.DEFAULT;<a name="line.64"></a>
<span class="sourceLineNo">065</span>    private File directory;<a name="line.65"></a>
<span class="sourceLineNo">066</span>    private String databaseName = DEFAULT_DATABASE_NAME;<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span>    private Environment environment;<a name="line.68"></a>
<span class="sourceLineNo">069</span>    private Database database;<a name="line.69"></a>
<span class="sourceLineNo">070</span><a name="line.70"></a>
<span class="sourceLineNo">071</span>    /**<a name="line.71"></a>
<span class="sourceLineNo">072</span>     * Constructor.<a name="line.72"></a>
<span class="sourceLineNo">073</span>     */<a name="line.73"></a>
<span class="sourceLineNo">074</span>    public BerkeleyKVDatabase() {<a name="line.74"></a>
<span class="sourceLineNo">075</span>    }<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span>    /**<a name="line.77"></a>
<span class="sourceLineNo">078</span>     * Get the filesystem directory containing the database.<a name="line.78"></a>
<span class="sourceLineNo">079</span>     *<a name="line.79"></a>
<span class="sourceLineNo">080</span>     * @return database directory<a name="line.80"></a>
<span class="sourceLineNo">081</span>     */<a name="line.81"></a>
<span class="sourceLineNo">082</span>    public synchronized File getDirectory() {<a name="line.82"></a>
<span class="sourceLineNo">083</span>        return this.directory;<a name="line.83"></a>
<span class="sourceLineNo">084</span>    }<a name="line.84"></a>
<span class="sourceLineNo">085</span><a name="line.85"></a>
<span class="sourceLineNo">086</span>    /**<a name="line.86"></a>
<span class="sourceLineNo">087</span>     * Configure the filesystem directory containing the database. Required property.<a name="line.87"></a>
<span class="sourceLineNo">088</span>     *<a name="line.88"></a>
<span class="sourceLineNo">089</span>     * @param directory database directory<a name="line.89"></a>
<span class="sourceLineNo">090</span>     */<a name="line.90"></a>
<span class="sourceLineNo">091</span>    public synchronized void setDirectory(File directory) {<a name="line.91"></a>
<span class="sourceLineNo">092</span>        this.directory = directory;<a name="line.92"></a>
<span class="sourceLineNo">093</span>    }<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>    /**<a name="line.95"></a>
<span class="sourceLineNo">096</span>     * Get the configured {@link Database} name.<a name="line.96"></a>
<span class="sourceLineNo">097</span>     *<a name="line.97"></a>
<span class="sourceLineNo">098</span>     * @return database name<a name="line.98"></a>
<span class="sourceLineNo">099</span>     */<a name="line.99"></a>
<span class="sourceLineNo">100</span>    public synchronized String getDatabaseName() {<a name="line.100"></a>
<span class="sourceLineNo">101</span>        return this.databaseName;<a name="line.101"></a>
<span class="sourceLineNo">102</span>    }<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span>    /**<a name="line.104"></a>
<span class="sourceLineNo">105</span>     * Configure the {@link Database} name. Defaults to {@link #DEFAULT_DATABASE_NAME}.<a name="line.105"></a>
<span class="sourceLineNo">106</span>     *<a name="line.106"></a>
<span class="sourceLineNo">107</span>     * @param databaseName database name<a name="line.107"></a>
<span class="sourceLineNo">108</span>     */<a name="line.108"></a>
<span class="sourceLineNo">109</span>    public synchronized void setDatabaseName(String databaseName) {<a name="line.109"></a>
<span class="sourceLineNo">110</span>        this.databaseName = databaseName;<a name="line.110"></a>
<span class="sourceLineNo">111</span>    }<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span>    /**<a name="line.113"></a>
<span class="sourceLineNo">114</span>     * Get the {@link EnvironmentConfig} to be used by this instance.<a name="line.114"></a>
<span class="sourceLineNo">115</span>     *<a name="line.115"></a>
<span class="sourceLineNo">116</span>     * &lt;p&gt;<a name="line.116"></a>
<span class="sourceLineNo">117</span>     * This method returns a copy; use {@link #setEnvironmentConfig setEnvironmentConfig()} to change.<a name="line.117"></a>
<span class="sourceLineNo">118</span>     * &lt;/p&gt;<a name="line.118"></a>
<span class="sourceLineNo">119</span>     *<a name="line.119"></a>
<span class="sourceLineNo">120</span>     * @return environment config<a name="line.120"></a>
<span class="sourceLineNo">121</span>     */<a name="line.121"></a>
<span class="sourceLineNo">122</span>    public synchronized EnvironmentConfig getEnvironmentConfig() {<a name="line.122"></a>
<span class="sourceLineNo">123</span>        return this.environmentConfig.clone();<a name="line.123"></a>
<span class="sourceLineNo">124</span>    }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span>    /**<a name="line.126"></a>
<span class="sourceLineNo">127</span>     * Set a custom {@link EnvironmentConfig} to be used by this instance at startup.<a name="line.127"></a>
<span class="sourceLineNo">128</span>     *<a name="line.128"></a>
<span class="sourceLineNo">129</span>     * &lt;p&gt;<a name="line.129"></a>
<span class="sourceLineNo">130</span>     * The default {@link EnvironmentConfig} is configured for<a name="line.130"></a>
<span class="sourceLineNo">131</span>     * {@linkplain EnvironmentConfig#getTxnSerializableIsolation serializable}<a name="line.131"></a>
<span class="sourceLineNo">132</span>     * {@linkplain EnvironmentConfig#getTransactional transactional} operation and with<a name="line.132"></a>
<span class="sourceLineNo">133</span>     * {@linkplain EnvironmentConfig#getAllowCreate allowCreate} set to true.<a name="line.133"></a>
<span class="sourceLineNo">134</span>     * &lt;/p&gt;<a name="line.134"></a>
<span class="sourceLineNo">135</span>     *<a name="line.135"></a>
<span class="sourceLineNo">136</span>     * &lt;p&gt;<a name="line.136"></a>
<span class="sourceLineNo">137</span>     * The given {@code config} must at least be configured for transactional operation.<a name="line.137"></a>
<span class="sourceLineNo">138</span>     * &lt;/p&gt;<a name="line.138"></a>
<span class="sourceLineNo">139</span>     *<a name="line.139"></a>
<span class="sourceLineNo">140</span>     * @param config environment config<a name="line.140"></a>
<span class="sourceLineNo">141</span>     * @throws IllegalArgumentException if {@code config} does not configured to be<a name="line.141"></a>
<span class="sourceLineNo">142</span>     *  {@linkplain EnvironmentConfig#getTransactional transactional}<a name="line.142"></a>
<span class="sourceLineNo">143</span>     */<a name="line.143"></a>
<span class="sourceLineNo">144</span>    public synchronized void setEnvironmentConfig(EnvironmentConfig config) {<a name="line.144"></a>
<span class="sourceLineNo">145</span>        if (!config.getTransactional())<a name="line.145"></a>
<span class="sourceLineNo">146</span>            throw new IllegalArgumentException("environment config must be transactional");<a name="line.146"></a>
<span class="sourceLineNo">147</span>        this.environmentConfig = config;<a name="line.147"></a>
<span class="sourceLineNo">148</span>    }<a name="line.148"></a>
<span class="sourceLineNo">149</span><a name="line.149"></a>
<span class="sourceLineNo">150</span>    /**<a name="line.150"></a>
<span class="sourceLineNo">151</span>     * Get the default {@link TransactionConfig} to be used by this instance.<a name="line.151"></a>
<span class="sourceLineNo">152</span>     *<a name="line.152"></a>
<span class="sourceLineNo">153</span>     * &lt;p&gt;<a name="line.153"></a>
<span class="sourceLineNo">154</span>     * This method returns a copy; use {@link #setTransactionConfig setTransactionConfig()} to change.<a name="line.154"></a>
<span class="sourceLineNo">155</span>     * &lt;/p&gt;<a name="line.155"></a>
<span class="sourceLineNo">156</span>     *<a name="line.156"></a>
<span class="sourceLineNo">157</span>     * @return transaction config<a name="line.157"></a>
<span class="sourceLineNo">158</span>     */<a name="line.158"></a>
<span class="sourceLineNo">159</span>    public synchronized TransactionConfig getTransactionConfig() {<a name="line.159"></a>
<span class="sourceLineNo">160</span>        return this.defaultTransactionConfig.clone();<a name="line.160"></a>
<span class="sourceLineNo">161</span>    }<a name="line.161"></a>
<span class="sourceLineNo">162</span><a name="line.162"></a>
<span class="sourceLineNo">163</span>    /**<a name="line.163"></a>
<span class="sourceLineNo">164</span>     * Configure a custom default {@link TransactionConfig} to be used by this instance for transactions.<a name="line.164"></a>
<span class="sourceLineNo">165</span>     *<a name="line.165"></a>
<span class="sourceLineNo">166</span>     * &lt;p&gt;<a name="line.166"></a>
<span class="sourceLineNo">167</span>     * Note: this configures the default; this default config can be overridden &lt;i&gt;for the next transaction in the<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * current thread only&lt;/i&gt; via {@link #setNextTransactionConfig setNextTransactionConfig()}.<a name="line.168"></a>
<span class="sourceLineNo">169</span>     * &lt;/p&gt;<a name="line.169"></a>
<span class="sourceLineNo">170</span>     *<a name="line.170"></a>
<span class="sourceLineNo">171</span>     * &lt;p&gt;<a name="line.171"></a>
<span class="sourceLineNo">172</span>     * The default setting for this property is {@link TransactionConfig#DEFAULT}.<a name="line.172"></a>
<span class="sourceLineNo">173</span>     * &lt;/p&gt;<a name="line.173"></a>
<span class="sourceLineNo">174</span>     *<a name="line.174"></a>
<span class="sourceLineNo">175</span>     * @param config transaction config<a name="line.175"></a>
<span class="sourceLineNo">176</span>     * @throws IllegalArgumentException if {@code config} is null<a name="line.176"></a>
<span class="sourceLineNo">177</span>     * @see #setNextTransactionConfig setNextTransactionConfig()<a name="line.177"></a>
<span class="sourceLineNo">178</span>     */<a name="line.178"></a>
<span class="sourceLineNo">179</span>    public synchronized void setTransactionConfig(TransactionConfig config) {<a name="line.179"></a>
<span class="sourceLineNo">180</span>        if (config == null)<a name="line.180"></a>
<span class="sourceLineNo">181</span>            throw new IllegalArgumentException("null config");<a name="line.181"></a>
<span class="sourceLineNo">182</span>        this.defaultTransactionConfig = config;<a name="line.182"></a>
<span class="sourceLineNo">183</span>    }<a name="line.183"></a>
<span class="sourceLineNo">184</span><a name="line.184"></a>
<span class="sourceLineNo">185</span>    /**<a name="line.185"></a>
<span class="sourceLineNo">186</span>     * Configure a custom {@link TransactionConfig} to be used for the next transaction in the current thread.<a name="line.186"></a>
<span class="sourceLineNo">187</span>     * The next, and only the next, invocation of {@link #createTransaction} in the current thread will<a name="line.187"></a>
<span class="sourceLineNo">188</span>     * use the given configuration. After that, subsequent transactions will revert back to the<a name="line.188"></a>
<span class="sourceLineNo">189</span>     * {@linkplain #setTransactionConfig default} (even if the invocation of {@link #createTransaction} failed).<a name="line.189"></a>
<span class="sourceLineNo">190</span>     *<a name="line.190"></a>
<span class="sourceLineNo">191</span>     * @param config transaction config<a name="line.191"></a>
<span class="sourceLineNo">192</span>     * @throws IllegalArgumentException if {@code config} is null<a name="line.192"></a>
<span class="sourceLineNo">193</span>     * @see #setTransactionConfig setTransactionConfig()<a name="line.193"></a>
<span class="sourceLineNo">194</span>     */<a name="line.194"></a>
<span class="sourceLineNo">195</span>    public void setNextTransactionConfig(TransactionConfig config) {<a name="line.195"></a>
<span class="sourceLineNo">196</span>        if (config == null)<a name="line.196"></a>
<span class="sourceLineNo">197</span>            throw new IllegalArgumentException("null config");<a name="line.197"></a>
<span class="sourceLineNo">198</span>        NEXT_TX_CONFIG.set(config);<a name="line.198"></a>
<span class="sourceLineNo">199</span>    }<a name="line.199"></a>
<span class="sourceLineNo">200</span><a name="line.200"></a>
<span class="sourceLineNo">201</span>    /**<a name="line.201"></a>
<span class="sourceLineNo">202</span>     * Get the {@link DatabaseConfig} to be used by this instance.<a name="line.202"></a>
<span class="sourceLineNo">203</span>     *<a name="line.203"></a>
<span class="sourceLineNo">204</span>     * &lt;p&gt;<a name="line.204"></a>
<span class="sourceLineNo">205</span>     * This method returns a copy; use {@link #setDatabaseConfig setDatabaseConfig()} to change.<a name="line.205"></a>
<span class="sourceLineNo">206</span>     * &lt;/p&gt;<a name="line.206"></a>
<span class="sourceLineNo">207</span>     *<a name="line.207"></a>
<span class="sourceLineNo">208</span>     * @return database config<a name="line.208"></a>
<span class="sourceLineNo">209</span>     */<a name="line.209"></a>
<span class="sourceLineNo">210</span>    public synchronized DatabaseConfig getDatabaseConfig() {<a name="line.210"></a>
<span class="sourceLineNo">211</span>        return this.databaseConfig.clone();<a name="line.211"></a>
<span class="sourceLineNo">212</span>    }<a name="line.212"></a>
<span class="sourceLineNo">213</span><a name="line.213"></a>
<span class="sourceLineNo">214</span>    /**<a name="line.214"></a>
<span class="sourceLineNo">215</span>     * Apply selected database configuration parameters from the given instance to the<a name="line.215"></a>
<span class="sourceLineNo">216</span>     * {@link DatabaseConfig} this instance will use when opening the {@link Database} at startup.<a name="line.216"></a>
<span class="sourceLineNo">217</span>     *<a name="line.217"></a>
<span class="sourceLineNo">218</span>     * &lt;p&gt;<a name="line.218"></a>
<span class="sourceLineNo">219</span>     * The default {@link DatabaseConfig} is configured for transactional operation and with<a name="line.219"></a>
<span class="sourceLineNo">220</span>     * {@linkplain EnvironmentConfig#getAllowCreate allowCreate} set to true.<a name="line.220"></a>
<span class="sourceLineNo">221</span>     * &lt;/p&gt;<a name="line.221"></a>
<span class="sourceLineNo">222</span>     *<a name="line.222"></a>
<span class="sourceLineNo">223</span>     * Only certain allowed configuration properties are copied. The copied properties are:<a name="line.223"></a>
<span class="sourceLineNo">224</span>     * &lt;ul&gt;<a name="line.224"></a>
<span class="sourceLineNo">225</span>     * &lt;li&gt;{@linkplain DatabaseConfig#getAllowCreate allowCreate}&lt;/li&gt;<a name="line.225"></a>
<span class="sourceLineNo">226</span>     * &lt;li&gt;{@linkplain DatabaseConfig#getCacheMode cacheMode}&lt;/li&gt;<a name="line.226"></a>
<span class="sourceLineNo">227</span>     * &lt;li&gt;{@linkplain DatabaseConfig#getDeferredWrite deferredWrite}&lt;/li&gt;<a name="line.227"></a>
<span class="sourceLineNo">228</span>     * &lt;li&gt;{@linkplain DatabaseConfig#getExclusiveCreate exclusiveCreate}&lt;/li&gt;<a name="line.228"></a>
<span class="sourceLineNo">229</span>     * &lt;li&gt;{@linkplain DatabaseConfig#getNodeMaxEntries nodeMaxEntries}&lt;/li&gt;<a name="line.229"></a>
<span class="sourceLineNo">230</span>     * &lt;li&gt;{@linkplain DatabaseConfig#getReadOnly readOnly}&lt;/li&gt;<a name="line.230"></a>
<span class="sourceLineNo">231</span>     * &lt;li&gt;{@linkplain DatabaseConfig#getReplicated replicated}&lt;/li&gt;<a name="line.231"></a>
<span class="sourceLineNo">232</span>     * &lt;li&gt;{@linkplain DatabaseConfig#getTemporary temporary}&lt;/li&gt;<a name="line.232"></a>
<span class="sourceLineNo">233</span>     * &lt;/ul&gt;<a name="line.233"></a>
<span class="sourceLineNo">234</span>     *<a name="line.234"></a>
<span class="sourceLineNo">235</span>     * @param config database config<a name="line.235"></a>
<span class="sourceLineNo">236</span>     */<a name="line.236"></a>
<span class="sourceLineNo">237</span>    public synchronized void setDatabaseConfig(DatabaseConfig config) {<a name="line.237"></a>
<span class="sourceLineNo">238</span>        this.databaseConfig<a name="line.238"></a>
<span class="sourceLineNo">239</span>          .setAllowCreate(config.getAllowCreate())<a name="line.239"></a>
<span class="sourceLineNo">240</span>          .setCacheMode(config.getCacheMode())<a name="line.240"></a>
<span class="sourceLineNo">241</span>          .setDeferredWrite(config.getDeferredWrite())<a name="line.241"></a>
<span class="sourceLineNo">242</span>          .setExclusiveCreate(config.getExclusiveCreate())<a name="line.242"></a>
<span class="sourceLineNo">243</span>          .setNodeMaxEntries(config.getNodeMaxEntries())<a name="line.243"></a>
<span class="sourceLineNo">244</span>          .setReadOnly(config.getReadOnly())<a name="line.244"></a>
<span class="sourceLineNo">245</span>          .setReplicated(config.getReplicated())<a name="line.245"></a>
<span class="sourceLineNo">246</span>          .setTemporary(config.getTemporary());<a name="line.246"></a>
<span class="sourceLineNo">247</span>    }<a name="line.247"></a>
<span class="sourceLineNo">248</span><a name="line.248"></a>
<span class="sourceLineNo">249</span>    /**<a name="line.249"></a>
<span class="sourceLineNo">250</span>     * Get the underlying {@link Environment} associated with this instance.<a name="line.250"></a>
<span class="sourceLineNo">251</span>     *<a name="line.251"></a>
<span class="sourceLineNo">252</span>     * @return the associated {@link Environment}<a name="line.252"></a>
<span class="sourceLineNo">253</span>     * @throws IllegalStateException if this instance is not {@linkplain #start started}<a name="line.253"></a>
<span class="sourceLineNo">254</span>     */<a name="line.254"></a>
<span class="sourceLineNo">255</span>    public synchronized Environment getEnvironment() {<a name="line.255"></a>
<span class="sourceLineNo">256</span>        if (this.environment == null)<a name="line.256"></a>
<span class="sourceLineNo">257</span>            throw new IllegalStateException("not started");<a name="line.257"></a>
<span class="sourceLineNo">258</span>        assert this.database != null;<a name="line.258"></a>
<span class="sourceLineNo">259</span>        return this.environment;<a name="line.259"></a>
<span class="sourceLineNo">260</span>    }<a name="line.260"></a>
<span class="sourceLineNo">261</span><a name="line.261"></a>
<span class="sourceLineNo">262</span>    /**<a name="line.262"></a>
<span class="sourceLineNo">263</span>     * Get the underlying {@link Database} associated with this instance.<a name="line.263"></a>
<span class="sourceLineNo">264</span>     *<a name="line.264"></a>
<span class="sourceLineNo">265</span>     * @return the associated {@link Database}<a name="line.265"></a>
<span class="sourceLineNo">266</span>     * @throws IllegalStateException if this instance is not {@linkplain #start started}<a name="line.266"></a>
<span class="sourceLineNo">267</span>     */<a name="line.267"></a>
<span class="sourceLineNo">268</span>    public synchronized Database getDatabase() {<a name="line.268"></a>
<span class="sourceLineNo">269</span>        if (this.environment == null)<a name="line.269"></a>
<span class="sourceLineNo">270</span>            throw new IllegalStateException("not started");<a name="line.270"></a>
<span class="sourceLineNo">271</span>        assert this.database != null;<a name="line.271"></a>
<span class="sourceLineNo">272</span>        return this.database;<a name="line.272"></a>
<span class="sourceLineNo">273</span>    }<a name="line.273"></a>
<span class="sourceLineNo">274</span><a name="line.274"></a>
<span class="sourceLineNo">275</span>// KVDatabase<a name="line.275"></a>
<span class="sourceLineNo">276</span><a name="line.276"></a>
<span class="sourceLineNo">277</span>    /**<a name="line.277"></a>
<span class="sourceLineNo">278</span>     * Create a new transaction.<a name="line.278"></a>
<span class="sourceLineNo">279</span>     *<a name="line.279"></a>
<span class="sourceLineNo">280</span>     * @throws IllegalStateException if this instance is not {@linkplain #start started}<a name="line.280"></a>
<span class="sourceLineNo">281</span>     * @throws KVDatabaseException if an unexpected error occurs<a name="line.281"></a>
<span class="sourceLineNo">282</span>     */<a name="line.282"></a>
<span class="sourceLineNo">283</span>    @Override<a name="line.283"></a>
<span class="sourceLineNo">284</span>    public synchronized BerkeleyKVTransaction createTransaction() {<a name="line.284"></a>
<span class="sourceLineNo">285</span><a name="line.285"></a>
<span class="sourceLineNo">286</span>        // Check open<a name="line.286"></a>
<span class="sourceLineNo">287</span>        if (this.environment == null)<a name="line.287"></a>
<span class="sourceLineNo">288</span>            throw new IllegalStateException("not started");<a name="line.288"></a>
<span class="sourceLineNo">289</span>        assert this.database != null;<a name="line.289"></a>
<span class="sourceLineNo">290</span><a name="line.290"></a>
<span class="sourceLineNo">291</span>        // Get the config for this transaction<a name="line.291"></a>
<span class="sourceLineNo">292</span>        TransactionConfig config = NEXT_TX_CONFIG.get();<a name="line.292"></a>
<span class="sourceLineNo">293</span>        if (config == null)<a name="line.293"></a>
<span class="sourceLineNo">294</span>            config = this.defaultTransactionConfig;<a name="line.294"></a>
<span class="sourceLineNo">295</span>        else<a name="line.295"></a>
<span class="sourceLineNo">296</span>            NEXT_TX_CONFIG.remove();<a name="line.296"></a>
<span class="sourceLineNo">297</span><a name="line.297"></a>
<span class="sourceLineNo">298</span>        // Create the transaction<a name="line.298"></a>
<span class="sourceLineNo">299</span>        final Transaction bdbTx;<a name="line.299"></a>
<span class="sourceLineNo">300</span>        try {<a name="line.300"></a>
<span class="sourceLineNo">301</span>            bdbTx = this.environment.beginTransaction(null, config);<a name="line.301"></a>
<span class="sourceLineNo">302</span>        } catch (DatabaseException e) {<a name="line.302"></a>
<span class="sourceLineNo">303</span>            throw new KVDatabaseException(this, e);<a name="line.303"></a>
<span class="sourceLineNo">304</span>        }<a name="line.304"></a>
<span class="sourceLineNo">305</span>        final BerkeleyKVTransaction tx = new BerkeleyKVTransaction(this, bdbTx);<a name="line.305"></a>
<span class="sourceLineNo">306</span><a name="line.306"></a>
<span class="sourceLineNo">307</span>        // Record transaction for possible cleanup on shutdown<a name="line.307"></a>
<span class="sourceLineNo">308</span>        this.openTransactions.add(tx);<a name="line.308"></a>
<span class="sourceLineNo">309</span><a name="line.309"></a>
<span class="sourceLineNo">310</span>        // Done<a name="line.310"></a>
<span class="sourceLineNo">311</span>        return tx;<a name="line.311"></a>
<span class="sourceLineNo">312</span>    }<a name="line.312"></a>
<span class="sourceLineNo">313</span><a name="line.313"></a>
<span class="sourceLineNo">314</span>    /**<a name="line.314"></a>
<span class="sourceLineNo">315</span>     * Remove a transaction that is now closed.<a name="line.315"></a>
<span class="sourceLineNo">316</span>     */<a name="line.316"></a>
<span class="sourceLineNo">317</span>    synchronized void removeTransaction(BerkeleyKVTransaction tx) {<a name="line.317"></a>
<span class="sourceLineNo">318</span>        this.openTransactions.remove(tx);<a name="line.318"></a>
<span class="sourceLineNo">319</span>    }<a name="line.319"></a>
<span class="sourceLineNo">320</span><a name="line.320"></a>
<span class="sourceLineNo">321</span>// Lifecycle<a name="line.321"></a>
<span class="sourceLineNo">322</span><a name="line.322"></a>
<span class="sourceLineNo">323</span>    /**<a name="line.323"></a>
<span class="sourceLineNo">324</span>     * Start this instance. This method must be called prior to creating any transactions.<a name="line.324"></a>
<span class="sourceLineNo">325</span>     *<a name="line.325"></a>
<span class="sourceLineNo">326</span>     * &lt;p&gt;<a name="line.326"></a>
<span class="sourceLineNo">327</span>     * This method is idempotent.<a name="line.327"></a>
<span class="sourceLineNo">328</span>     * &lt;/p&gt;<a name="line.328"></a>
<span class="sourceLineNo">329</span>     *<a name="line.329"></a>
<span class="sourceLineNo">330</span>     * @throws IllegalStateException if this instance is not properly configured<a name="line.330"></a>
<span class="sourceLineNo">331</span>     */<a name="line.331"></a>
<span class="sourceLineNo">332</span>    @PostConstruct<a name="line.332"></a>
<span class="sourceLineNo">333</span>    public synchronized void start() {<a name="line.333"></a>
<span class="sourceLineNo">334</span>        if (this.environment != null) {<a name="line.334"></a>
<span class="sourceLineNo">335</span>            assert this.database != null;<a name="line.335"></a>
<span class="sourceLineNo">336</span>            return;<a name="line.336"></a>
<span class="sourceLineNo">337</span>        }<a name="line.337"></a>
<span class="sourceLineNo">338</span>        assert this.openTransactions.isEmpty();<a name="line.338"></a>
<span class="sourceLineNo">339</span>        if (this.directory == null)<a name="line.339"></a>
<span class="sourceLineNo">340</span>            throw new IllegalStateException("no directory configured");<a name="line.340"></a>
<span class="sourceLineNo">341</span>        if (this.databaseName == null)<a name="line.341"></a>
<span class="sourceLineNo">342</span>            throw new IllegalStateException("no database name configured");<a name="line.342"></a>
<span class="sourceLineNo">343</span>        boolean success = false;<a name="line.343"></a>
<span class="sourceLineNo">344</span>        try {<a name="line.344"></a>
<span class="sourceLineNo">345</span>            this.environment = new Environment(this.directory, this.environmentConfig);<a name="line.345"></a>
<span class="sourceLineNo">346</span>            this.database = this.environment.openDatabase(null, this.databaseName, this.databaseConfig);<a name="line.346"></a>
<span class="sourceLineNo">347</span>            success = true;<a name="line.347"></a>
<span class="sourceLineNo">348</span>        } finally {<a name="line.348"></a>
<span class="sourceLineNo">349</span>            if (!success) {<a name="line.349"></a>
<span class="sourceLineNo">350</span>                try {<a name="line.350"></a>
<span class="sourceLineNo">351</span>                    for (AutoCloseable item : new AutoCloseable[] { this.database, this.environment }) {<a name="line.351"></a>
<span class="sourceLineNo">352</span>                        if (item != null) {<a name="line.352"></a>
<span class="sourceLineNo">353</span>                            try {<a name="line.353"></a>
<span class="sourceLineNo">354</span>                                item.close();<a name="line.354"></a>
<span class="sourceLineNo">355</span>                            } catch (Throwable e) {<a name="line.355"></a>
<span class="sourceLineNo">356</span>                                this.log.error("caught exception cleaning up after failed startup (ignoring)", e);<a name="line.356"></a>
<span class="sourceLineNo">357</span>                            }<a name="line.357"></a>
<span class="sourceLineNo">358</span>                        }<a name="line.358"></a>
<span class="sourceLineNo">359</span>                    }<a name="line.359"></a>
<span class="sourceLineNo">360</span>                } finally {<a name="line.360"></a>
<span class="sourceLineNo">361</span>                    this.database = null;<a name="line.361"></a>
<span class="sourceLineNo">362</span>                    this.environment = null;<a name="line.362"></a>
<span class="sourceLineNo">363</span>                }<a name="line.363"></a>
<span class="sourceLineNo">364</span>            }<a name="line.364"></a>
<span class="sourceLineNo">365</span>        }<a name="line.365"></a>
<span class="sourceLineNo">366</span>    }<a name="line.366"></a>
<span class="sourceLineNo">367</span><a name="line.367"></a>
<span class="sourceLineNo">368</span>    /**<a name="line.368"></a>
<span class="sourceLineNo">369</span>     * Stop this instance. Does nothing if not {@linkplain #start started}.<a name="line.369"></a>
<span class="sourceLineNo">370</span>     */<a name="line.370"></a>
<span class="sourceLineNo">371</span>    @PreDestroy<a name="line.371"></a>
<span class="sourceLineNo">372</span>    public void stop() {<a name="line.372"></a>
<span class="sourceLineNo">373</span><a name="line.373"></a>
<span class="sourceLineNo">374</span>        // Mark this instance as shutdown so no new transactions are created<a name="line.374"></a>
<span class="sourceLineNo">375</span>        final Environment oldEnvironment;<a name="line.375"></a>
<span class="sourceLineNo">376</span>        final Database oldDatabase;<a name="line.376"></a>
<span class="sourceLineNo">377</span>        final ArrayList&lt;BerkeleyKVTransaction&gt; oldTransactions;<a name="line.377"></a>
<span class="sourceLineNo">378</span>        synchronized (this) {<a name="line.378"></a>
<span class="sourceLineNo">379</span>            oldEnvironment = this.environment;<a name="line.379"></a>
<span class="sourceLineNo">380</span>            oldDatabase = this.database;<a name="line.380"></a>
<span class="sourceLineNo">381</span>            oldTransactions = new ArrayList&lt;BerkeleyKVTransaction&gt;(this.openTransactions);<a name="line.381"></a>
<span class="sourceLineNo">382</span>            this.environment = null;<a name="line.382"></a>
<span class="sourceLineNo">383</span>            this.database = null;<a name="line.383"></a>
<span class="sourceLineNo">384</span>            this.openTransactions.clear();<a name="line.384"></a>
<span class="sourceLineNo">385</span>        }<a name="line.385"></a>
<span class="sourceLineNo">386</span><a name="line.386"></a>
<span class="sourceLineNo">387</span>        // Were we already stopped?<a name="line.387"></a>
<span class="sourceLineNo">388</span>        if (oldEnvironment == null) {<a name="line.388"></a>
<span class="sourceLineNo">389</span>            assert this.database == null;<a name="line.389"></a>
<span class="sourceLineNo">390</span>            return;<a name="line.390"></a>
<span class="sourceLineNo">391</span>        }<a name="line.391"></a>
<span class="sourceLineNo">392</span><a name="line.392"></a>
<span class="sourceLineNo">393</span>        // Rollback any open transactions so cursors are cleaned up and transactions closed<a name="line.393"></a>
<span class="sourceLineNo">394</span>        for (BerkeleyKVTransaction tx : oldTransactions) {<a name="line.394"></a>
<span class="sourceLineNo">395</span>            try {<a name="line.395"></a>
<span class="sourceLineNo">396</span>                tx.rollback();<a name="line.396"></a>
<span class="sourceLineNo">397</span>            } catch (Throwable e) {<a name="line.397"></a>
<span class="sourceLineNo">398</span>                this.log.debug("caught exception closing open transaction during shutdown (ignoring)", e);<a name="line.398"></a>
<span class="sourceLineNo">399</span>            }<a name="line.399"></a>
<span class="sourceLineNo">400</span>        }<a name="line.400"></a>
<span class="sourceLineNo">401</span><a name="line.401"></a>
<span class="sourceLineNo">402</span>        // Shut down database<a name="line.402"></a>
<span class="sourceLineNo">403</span>        try {<a name="line.403"></a>
<span class="sourceLineNo">404</span>            oldDatabase.close();<a name="line.404"></a>
<span class="sourceLineNo">405</span>        } catch (Throwable e) {<a name="line.405"></a>
<span class="sourceLineNo">406</span>            this.log.error("caught exception closing database during shutdown (ignoring)", e);<a name="line.406"></a>
<span class="sourceLineNo">407</span>        }<a name="line.407"></a>
<span class="sourceLineNo">408</span><a name="line.408"></a>
<span class="sourceLineNo">409</span>        // Shut down environment<a name="line.409"></a>
<span class="sourceLineNo">410</span>        try {<a name="line.410"></a>
<span class="sourceLineNo">411</span>            oldEnvironment.close();<a name="line.411"></a>
<span class="sourceLineNo">412</span>        } catch (Throwable e) {<a name="line.412"></a>
<span class="sourceLineNo">413</span>            this.log.error("caught exception closing environment during shutdown (ignoring)", e);<a name="line.413"></a>
<span class="sourceLineNo">414</span>        }<a name="line.414"></a>
<span class="sourceLineNo">415</span>    }<a name="line.415"></a>
<span class="sourceLineNo">416</span>}<a name="line.416"></a>
<span class="sourceLineNo">417</span><a name="line.417"></a>




























































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